.sk {
  border-left: 1px solid #c81523;
  position: absolute;
  left: 190px;
  top: 40px;
  padding-left: 10px;
}
.sk_list ul {
  padding-top: 9px;
}
.sk_list ul li {
  float: left;
}
.sk_list ul li a {
  padding: 0 25px;
  font-size: 16px;
  /* font-weight 400是normal，700是bold */
  font-weight: 700;
  color: #000;
}
.sk_con ul {
  float: right;
}
.sk_con ul li {
  float: left;
}
.sk_con ul li:last-child::after {
  content: '\e91e';
  font-family: 'icomoon';
}

.sk_con ul li a {
  padding: 0 16px;
  font-size: 14px;
}
.sk_con ul li:last-child a {
  padding-right: 5px;
}
.sk_bd ul {
  overflow: hidden;
}
.sk_bd ul li {
  overflow: hidden;
  float: left;
  margin-right: 3px;
  width: 280px;
  height: 460px;
  border: 1px solid transparent;
}
/* .sk_bd ul li img {
  width: 270px;
} */
.sk_bd ul li:nth-child(4n) {
  margin-right: 0;
}

.sk_bd ul li:hover {
  border: 1px solid #c81523;
}
.w{
  width: 1130px;
  margin: 0 auto;

}